Hardness tester



FIG. 1 is a perspective view of a hardness tester showing a first embodiment of our new design;

FIG. 2 is a front view of the first embodiment;

FIG. 3 is a rear view of the first embodiment;

FIG. 4 is a left side view of the first embodiment;

FIG. 5 is a right side view of the first embodiment;

FIG. 6 is a top view of the first embodiment;

FIG. 7 is a bottom view of the first embodiment;

FIG. 8 is a perspective view of a hardness tester showing a second embodiment of our new design;

FIG. 9 is a front view of the second embodiment;

FIG. 10 is a rear view of the second embodiment;

FIG. 11 is a left side view of the second embodiment;

FIG. 12 is a right side view of the second embodiment;

FIG. 13 is a top view of the second embodiment; and,

FIG. 14 is a bottom view of the second embodiment. 

CLAIM The ornamental design for a hardness tester, as shown. 